Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Steering Angle Sensor Zero Point Malfunction (C1290)

DESCRIPTION

The skid control ECU (brake actuator assembly) acquires steering angle sensor zero point every time the ignition switch is turned ON and the vehicle is driven at 35 km/h (22 mph) or more for approximately 5 seconds. The ECU also stores the previous zero point.

If front wheel alignment or steering wheel position is adjusted without disconnecting the negative battery terminal, or if yaw rate and acceleration sensor zero point is not acquired after the adjustments have been completed, the skid control ECU (brake actuator assembly) detects the difference between the previous zero point and newly acquired zero point and outputs this DTC to indicate a poor adjustment.

The steering angle sensor zero point malfunction warning will be canceled by turning the ignition switch off.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1290

Steering Angle Sensor Zero Point Malfunction

The steering angle sensor zero point calibration position vastly differs from the recorded value.

  • Yaw rate and acceleration sensor zero point calibration incomplete
  • Poor adjustment of the centered position of the steering wheel
  • Poor adjustment of front wheel alignment

CAUTION / NOTICE / HINT

NOTICE:

When replacing the skid control ECU (brake actuator assembly), perform zero point calibration and store system information (See page PROCEDURE PROCEDURE ).

PROCEDURE

1.

PERFORM ZERO POINT CALIBRATION OF YAW RATE AND ACCELERATION SENSOR

(a) Perform zero point calibration of the yaw rate and acceleration sensor (See page ).

HINT:

  • When the stored zero point of the yaw rate and acceleration sensor is cleared, the steering angle sensor zero point will also be cleared.
  • If the zero point and output value of the yaw rate and acceleration sensor and the output value of the speed sensors are not normal, steering angle sensor zero point cannot be acquired normally even if the vehicle is driven straight ahead at 35 km/h (22 mph) or more.
NEXT

2.

PERFORM STEERING ANGLE SENSOR ZERO POINT CALIBRATION

(a) Drive the vehicle straight ahead at 35 km/h (22 mph) or more for at least 5 seconds.

(b) Check that the centered position of the steering wheel is correctly set while driving straight ahead.

HINT:

If front wheel alignment and steering position are adjusted as a result of abnormal centered position of the steering wheel, acquire the yaw rate and acceleration sensor zero point again after the adjustments are completed.

OK:

The centered position of the steering wheel is correctly set.

OK

END

NG

ADJUST FRONT WHEEL ALIGNMENT OR STEERING POSITION

Transfer L4 Position Switch Circuit (C1268)
DESCRIPTION DTC No. Detection Item DTC Detection Condition Trouble Area C1268 Transfer L4 Position Switch Circuit Ei ...

Diameter of the Tire is not Uniform (C1337)
DESCRIPTION The skid control ECU (brake actuator assembly) measures the speed of each wheel by receiving signals from the speed sensors. These signals are used for recognizing whether all 4 wheel ...

Other materials:

System Description
SYSTEM DESCRIPTION 1. OUTLINE OF THEFT DETERRENT SYSTEM The theft deterrent system can be set/canceled by locking/unlocking the doors using the following operation: Entry lock operation*1 Wireless lock operation*2 Key-linked lock operation * ...

Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART Pre-collision System DTC No. Detection Item Link C1A02 Vehicle Information Not Obtained C1A10 Front Radar Sensor C1A11 Front ...

Replacement
REPLACEMENT PROCEDURE 1. REPLACE AUTOMATIC TRANSMISSION FLUID (a) Lift the vehicle. [*1] NOTICE: Set the vehicle on a lift so that the vehicle is kept level when it is lifted up (make sure that the tilt angle from the front to rear of the vehicle is within +/-1°). (b) Remove th ...

© 2011-2019 Copyright www.ttguide.net